Multiplexed Gpio; Gpio Multiplexing Table - Digi ConnectCore Hardware Reference Manual

About the module

Multiplexed GPIO

GPIO multiplexing table

The ConnectCore for i.MX51 has four GPIO banks. Each bank provides 32 bidirectional general purpose
input and output signals.
The GPIO pins are multiplexed with other functions on the module. For each pin there are up to 8
muxing options (called ALT modes). By default all GPIO pins are configured to their respective GPIO
signals. Since different modules require different pin settings (like pull up, keeper, etc) the i.MX51 has
an IOMUX controller to configure the pin settings.
The table below shows the ALT mode for each GPIO signal, the name of the Pad and the default use on
the module. For a detailed description of all the muxing options for each pin, refer to the i.MX51
Hardware Reference Manual.
WARNING! Do not connect signals marked NANDF_* to GND during boot time if you want
to boot from NAND flash.
GPIO
GPIO1_0
GPIO1_1
GPIO1_2
GPIO1_3
GPIO1_4
GPIO1_5
GPIO1_6
GPIO1_7
GPIO1_8
GPIO1_9
GPIO1_10 ALT7
GPIO1_11 ALT2
GPIO1_12 ALT2
GPIO1_13 ALT2
GPIO1_14 ALT2
GPIO1_15 ALT2
GPIO1_16 ALT2
ConnectCore for i.MX51 Hardware Reference Manual
Mode Pad
ALT1 GPIO1_0
ALT1 GPIO1_1
ALT0 GPIO1_2
ALT0 GPIO1_3
ALT0 GPIO1_4
ALT0 GPIO1_5
ALT0 GPIO1_6
ALT0 GPIO1_7
ALT0 GPIO1_8
ALT0 GPIO1_9
DISP2_DAT11
USBH1_DATA0
USBH1_DATA1
USBH1_DATA2
USBH1_DATA3
USBH1_DATA4
USBH1_DATA5
On module default as
HDMI Interrupt
User Button 2
I2C2_SCL
I2C2_SDA
Watchdog reset
MC13892 Interrupt
Accelerometer Interrupt 2
Accelerometer Interrupt 1
USB Power enable
Ethernet 2 Interrupt
Ethernet 1
USB Host
USB Host
USB Host
USB Host
USB Host
USB Host
Multiplexed GPIO
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